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4 years ago

HElP mEh pLeAse plEaSE plEasE

Mathematics

2 answers:

Mariana [72]4 years ago

5 0

Answer:

43°

Step-by-step explanation:

let the unknown angle be X°

62°+x°+75°=180°{being sum of straight angle}

137°+x°=180°

x°=180-137

x°=43°

gayaneshka [121]4 years ago

4 0

Answer:

I am pretty sure its D

Step-by-step explanation: If you add 62 + 75 it would equal 137. Than you would have to subtract that from 180 which would give you 43.

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5x + 3y = 24

gizmo_the_mogwai [7]

Answer:

x-int is 24/5 y-int is 8 and x value when y is 3 is 3

Step-by-step explanation:

So for the x int, we can plug in 0 for y, because in a x intercept, the y is zero.

5x=24

x=24/5

for the y int, we can plug in 0 for x, because in a y intercept, the x is zero.

3y=24

y=3

now when y is 3, we can just plug that in.

5x + 3 times 3 = 24

5x+9=24

5x=15

x=3

hope this helps

7 0

3 years ago

Suppose that a random sample of size 64 is to be selected from a population with mean 40 and standard deviation 5. (a) What are

Dmitriy789 [7]

Answer:

a) $\bar X \sim N(40,\frac{5}{\sqrt{64}}=0.625)$

b) $P(39.6 \leq \bar X \leq 40.4)=0.4778$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Let X the random variable that represent interest on this case, and for this case we know the distribution for X is given by:

$X \sim N(\mu=40,\sigma=5)$

And let $\bar X$ represent the sample mean, the distribution for the sample mean is given by:

(a) What are the mean and standard deviation of the sampling distribution?

$\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})$

On this case $\bar X \sim N(40,\frac{5}{\sqrt{64}}=0.625)$

(b) What is the approximate probability that x will be within 0.4 of the population mean μ? (Round your answer to four decimal places.) P =

So for this case we want this probability:

$P(40-0.4 \leq \bar X \leq 40+0.4)= P(39.6 \leq \bar X \leq 40.4)$

And for this case we can use the z score given by this formula:

$Z=\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And using this concept we got this:

$P(\frac{39.6 -40}{\frac{5}{\sqrt{64}}} \leq \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}} \leq \frac{40.4 -40}{\frac{5}{\sqrt{64}}})$

$P(-0.64 \leq Z \leq 0.64) =P(z$

8 0

3 years ago

X=53+44+46? Is this right or no?

OleMash [197]

Answer:

X= 143°

Step-by-step explanation:

You could do it your way or as you can see, there's a right angle, which equals 90°, so you could either add 44+46+53 or 90+53. You get the same answer, which is 143°.

3 0

3 years ago

Read 2 more answers

Ryan bought a digital camera with a list price of $150 from an online store offering a 5% discount. He needs to pay $5.50 for sh

Thepotemich [5.8K]

The correct answer would be $148.

3 0

3 years ago

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Write a real world situation for the following equations:

Jet001 [13]

2. Snap gym costs $120 for registration fee and $25 each month. Awesome gym costs $45 each month with no registration fee. After how many months will the cost of the two gyms be equal ? 3. Awesome video game has a total of 100 points. If you are out, you miss 6 points. Cool video game has a total of 160 points. If you are out, you miss 10 points. After how many times of getting out will you have the same number of points on both the games ?

3 0

3 years ago